Contents

Summary

Teaser

Lieutenant CommanderData arrives at Geordi La Forge's quarters to take back Spot after La Forge borrowed her temporarily to experience having a pet cat before getting one for himself – a wise precaution, as La Forge found that he was not ready for a cat as yet because Spot ruined his quarters during her stay. They discuss training Spot in order to rid her of her somewhat reckless behavior, but the discussion is interrupted when CommanderRiker (on the intercom) calls all senior staff to the observation lounge for a mission briefing.

Act One

"Captain's Log, Stardate 47310.2. We are investigating the disappearance of the medical transport Fleming somewhere in the Hekaras Corridor. Our search is complicated by the unique properties of this particular region of space."

All of the senior staff are present in the observation lounge while Riker is briefing them about the disappearance of the USS Fleming, a medical transport vessel that had not been in contact with Starfleet for four days. Data continues the briefing describing the hazardous nature of the space surrounding the Hekaras Corridor due to the abnormally intense tetryon fields surrounding the corridor. The corridor itself is free of the fields and ships traveling at warp speed could only travel safely through the corridor in this region of space. CaptainPicard asks how long it will take to perform a level-one search of the region, and Data replies saying that it will take at least two days (much longer than normal) because the corridor is twelve light years in length and the interference from the tetryon fields severely limits the sensor range.

LieutenantWorf suggests using probes to supplement the sensors but they would make little difference as communication with the probes would be extremely difficult to maintain – the only viable solution would be to increase the efficiency of the sensors. CounselorTroi suggests contacting the inhabitants of Hekaras II, wondering if they had any contact with the Fleming. Riker states that the Enterprise had already contacted the Hekaran government; they had no contact with the Fleming but they did say that in the past week, only one vessel had traveled through the corridor – a Ferengi trader. Because the Fleming's inventory included a supply of rare and valuable bio-mimetic gel, Dr.Crusher suggests the possibility that the Ferengi may have hijacked the ship or stolen the supply of the gel and destroyed the Fleming. Picard agrees and orders Worf to initiate a search pattern for the Fleming as the Enterprise heads in to the corridor.

Some time later, La Forge is in main engineering performing maintenance on the dilithium chamber hoping to improve the efficiency of the warp engines. Data enters and reports to La Forge that there has been a small drop in the efficiency of the sensors and Commander Riker wants them to examine the phase buffers. La Forge says that he will assist Data in a moment and orders a crewman to transfer an EPS conduit through the stabilizer matrix as he closes the dilithium chamber and moves to another console. Data is curious about why La Forge is working on the warp engines, asking if something is wrong with them. La Forge replies in the negative but Data asks why he is having the EPS conduit stabilized. La Forge says that he wants a slightly higher power conversion level even though it will not affect the engines in any way. When Data questions his motives further, he reluctantly reveals that he has been in contact with CommanderDonald Kaplan, the chief engineer of the USS Intrepid and a former Starfleet Academy classmate of La Forge's. Kaplan reported the power conversion level of the Intrepid's engines was slightly higher than those on the Enterprise, which prompted La Forge to improve those on the Enterprise. Data assumes that La Forge is in competition with Kaplan but La Forge will not admit it, saying that the Enterprise should be better than any ship in Starfleet in all respects as it is the flagship. Eventually, he concedes that it is a matter of personal pride. When the computer reports that there is no change in the power conversion levels, La Forge is frustrated but is unable to refuse Data and they go to work on the sensors.

Data and La Forge are traveling through a Jefferies tube until they arrive at a junction where La Forge works on a phase buffer, hoping to improve the sensor efficiency. There is an increase, but it is not as high as La Forge had anticipated, suggesting that one of the stages in the sensor system is out of alignment. The pair proceed to another junction and en route, Data continues the discussion about training Spot, noting that his instruction has been "largely unsuccessful". La Forge cracks a joke saying that using a phaser on stun should do the trick, although Data does not recognize the humor. Data and La Forge pass up another junction and find that one of the phase buffers in the third junction is out of alignment. Repairs fix the alignment but sensor efficiency has only increased marginally. Just then, Riker calls Data on the intercom and informs him that a starship has been located on the long-range sensors and asks that he and Geordi report to the bridge. La Forge tells Data that nothing more can be done to improve the efficiency of the sensors and they acknowledge Riker's order and make their way to the bridge.

On the bridge, Worf reports that the Enterprise is now within visual range of the starship. When put on the viewscreen, a Ferengi vessel is shown – the same one that passed through the Hekaras Corridor a week ago. Data and La Forge arrive on the bridge; Data takes over for the operations officer and La Forge mans the engineering console. La Forge reports that there are no emissions from the vessel's plasma vents, suggesting that its warp drive is completely inactive. Data confirms this, adding that the impulse engines are inactive and that power levels in general are low. Life support is functioning and approximately four-hundred-and-fifty life signs are detected on board the ship. The crew is briefly puzzled; Picard orders Worf to open hailing frequencies but the hail goes unanswered. La Forge reports a lack of subspace emissions, suggesting that the field coils have been completely overloaded and explaining the Ferengi communications blackout and power loss. Since the Ferengi vessel's sensors are still functioning, he believes that using delta waves emitted from a deflector array could be modulated with a com signal, which the Ferengi ship could pick up. Picard proceeds with La Forge's suggestion and as a precautionary measure, orders for the tractor beams as the Enterprise moves to transporter range. Suddenly, Worf detects rising power levels from the Ferengi vessel. The Ferengi lock weapons and Riker quickly orders for the shields to be raised just before the Ferengi weapons fire hits the Enterprise.

Act Two

The Enterprise is hit by a second blast of weapons fire from the Ferengi vessel. Picard and Riker order for phasers, targeting the Ferengi weapons array only. The Ferengi ship is quickly disabled and the Enterprise sustains only minimal damage to deck five. The Ferengi vessel's power levels quickly stabilize and their impulse engines come back on-line. Riker realizes that they were merely playing dead, waiting for the Enterprise to come in closer. Picard is curious why the Ferengi would attack his ship in the first place and opens a channel to the Ferengi ship via La Forge's jury-rigged link. The Ferengi DaiMon, Prak, appears and Picard asks why the Enterprise was attacked. In turn, Prak is outraged, accusing the Enterprise of aggression which led to his ship becoming disabled. Picard and Riker are confused about Prak's accusation, and tell Prak the Enterprise was merely ascertaining the status of Prak's disabled vessel. Prak is skeptical about Picard's motives and threatens that the Enterprise's "attack" is an act of war but Picard insists that there has been a misunderstanding and suggests that Prak come aboard the Enterprise to discuss the situation. Prak sees no reason to trust Picard but Picard is determined to investigate what happened to the Ferengi ship, as it may have a connection to the disappearance of the Fleming. After Picard tells Prak that the Enterprise will leave Prak's ship stranded within the corridor if he refuses to speak with them, Prak reluctantly accepts the captain's offer and transports over to the Enterprise.

DaiMon Prak is outraged at the "Federation attack" on his ship

In the ready room, Prak reveals to Picard and Riker that his ship detected what appeared to be a Federationsignal buoy and that when they approached it, it emitted a verteron pulse, immediately disabling the ship's warp drive, sensors and communications. Prak assumed that it was a new Federation weapon but Picard informs Prak that the Federation established the Hekaras Corridor as a safe route through the sector and that little stood to be gained from laying mines within it. Riker reinforces Picard's comment by revealing that this may not have been an isolated incident as the Fleming had gone missing in the Corridor. Prak admits that his ship encountered a Federation ship a few days before but it did not appear to be in any distress. Riker asks for the ship's heading but Prak is unwilling to divulge the information so easily and strongly hints that Picard could spare some of his engineering staff to help Prak's crew with repairs to his ship in exchange for the information they gleaned on the Fleming in the ship's sensor logs. Picard understands the hint and spares a team to assist Prak with his repairs in exchange for the Fleming's last known heading.

In his quarters, Data is still trying to train Spot as La Forge comes, in but his attempts are unsuccessful and he admits that it may not be possible to train her. La Forge tells Data that he may have found another way to improve the power conversion levels of the warp engines. In main engineering, La Forge asks Data to keep the EPS flow constant while he modulates the flow of the power taps. Data informs La Forge that the increase will be marginal but Geordi knows this and that this marginal increase may be enough – Kaplan sent La Forge a subspace message saying that the Intrepid's power conversion levels are at 97.1%. After completing their work, the computer reports that the power conversion levels of the Enterprise are now at 97.2%, and La Forge is finally satisfied with "winning" his competition with Commander Kaplan.

"Captain's Log, Stardate, 47311.4. Based on the Ferengi sensor logs, we have traced the Fleming's most likely course. It now appears that the vessel may have come to an unfortunate end."

The Enterprise has approached a large field of debris. Picard and Data are studying the debris field on a monitor on one of the science stations on the bridge and although the origin of the field is unknown it is possible that the debris could be the remains of the Fleming because the debris consists mostly of duranium and poly-composite fragments (materials used in starship construction) and because the debris field contains enough mass to account for the Fleming. The Enterprise now navigates around the debris field to see if the Fleming can be positively identified. During the investigation, Data picks up a small, metallic object on the sensors. Riker guesses that it could be either a probe casing or some sort of a log recorder but Data doubts Riker's guesses as an unusual signal is being emitted from the object. Data's tone then changes as he realizes that the object is beginning to generate a verteron field. Picard immediately orders for shields to be raised and for a full reverse but it is too late as a bright light fills the bridge and as the light disappears, the lights on the bridge dim and several of the consoles are now dark. A damage report reveals that the warp drive has been disabled as have the shields and all other subspace systems – the Enterprise has now fallen to the same fate as the Ferengi ship. An unidentified vessel now approaches the Enterprise with two lifeforms aboard and the transporters of the vessel are initiated. All attempts to raise the shields fail and red alert is raised when the Enterprise is boarded. There is a brief moment of tension as the crew does not know where the crew of the unidentified ship are going to materialize and the moment is broken when La Forge, on the intercom, calls the bridge informing Picard that that there are intruders in main engineering. Two humanoids (one male and one female) are standing in front of the now inactive warp core. La Forge asks them what they want and the male, Rabal, says that he wants them to listen and the female, Serova his sister, says that they're killing them.

Act Three

The Enterprise is boarded

Picard, Riker, Data, La Forge and two security guards are present with Rabal and Serova in the observation lounge. Picard wants an explanation of their accusation due to its seriousness. Rabal, the seemingly more reasonable of the two, claims that his and Serova's research shows that warp fields are slowly damaging their region of space and that their homeworld (they are Hekarans, the inhabitants of Hekaras II) will one day be rendered uninhabitable if nothing is done to prevent the damage that they claim is being caused. Picard briefly considers what the scientists have just said, but La Forge openly shows his skepticism as he has already heard of their theories – the Federation Science Council reviewed their research several years before, but dismissed it for lacking evidence. Picard appreciates their situation but cares little for their methods in getting the Federation's attention and suggests placing a request to the Council for further research, but neither are interested in the bureaucracy that would ensue and feel that their method would have got a faster response from the Federation. Riker asks them if that was how they justified attacking their ships, but Serova does not consider it to be an attack as neither the Enterprise nor the Ferengi vessel suffered any casualties or serious damage.

Riker responds furiously at their "justification" and both scientists realized that they had taken extreme measures to get the Federation's attention, but neither are going to apologize for their actions. Picard asks La Forge how long it will take to repair the warp engines but because the warp coils were completely overloaded by the verteron pulse, La Forge estimates that it will take at least thirty-six hours. Serova knows exactly how the pulse disabled the warp engines and offers her assistance, which will reduce the repair time to just ten hours but she will only assist on condition that they review the research. Picard refuses to be forced into giving in to their demands but due to the seriousness of their claims and the urgency of locating the Fleming, he agrees to review their research but makes it clear that his top priority is to recover the Fleming. Furthermore, he expects Serova and Rabal to assist the engineering staff in restoring the ship's systems and to deactivate all of the remaining probes within the corridor – if they refuse they will be placed in the brig and taken to the nearest Federation starbase where they will be charged. Serova is unwilling to back down but Rabal agrees to help Picard but insists that he review the research. Picard then orders La Forge to work with the Hekaran scientists in the effort to restore the ship's systems although La Forge is unhappy with the idea of having to work with them.

La Forge, Serova and Rabal are working in engineering and they restore the shields. Serova informs La Forge that the warp engines can be engaged in eight hours but La Forge is irritated and says that even when the engines are back on-line, it will take at least a week to recalibrate them. Serova sarcastically apologizes for the inconvenience, saying that her concerns are more important than restoring the warp drive of the Enterprise. La Forge continues to argue with her and she soon leaves after realizing that La Forge's mind has already been made up. Rabal asks La Forge to reconsider Serova's research, as Rabal himself was in a similar position a few years before and hopes that if he and Serova can persuade Starfleet to prohibit the use of warp drive through the corridor, they will convince the Hekarans to stop using warp drive as well, effectively isolating the Hekarans from the Federation – a sacrifice that Rabal and Serova are more than willing to make.

In one of the science labs, Data reports his findings on the research to Captain Picard, Serova and Rabal. Using a monitor he explains that the two scientists' theory claims that there are regions of subspace instability within the corridor and that prolonged exposure of warp field energy to these regions of subspace will caused them to rupture resulting in a subspace rift. Picard compares the theory to running up and down a carpet – eventually you will wear it out – an essentially correct analogy. Picard asks Data if the theory can be proven but Data says that there is not enough evidence to prove it as of yet. Rabal is disappointed but Data continues by saying that the only way to determine whether or not a rift would form would be to expose a region of space within the Corridor to warp field energy at least a million times greater than that normally generated by most starships. Rabal says that the effect is cumulative and that each time a vessel travels at warp through the Corridor, they are one step closer to a rift forming in the corridor. Data agrees with the possibility and recommends that the Science Council sends a science vessel to the Corridor to hopefully resolve any further questions but Serova is dissatisfied as further delays will be caused. Before he can respond, Picard is interrupted by Riker on the intercom reporting that they have located the Fleming on the long-range sensors. The vessel appears to be intact but its subspace systems are disabled although its shields are functional. Picard says that they'll meet with the Fleming as soon as the warp drive is back online. Picard asks for Data, Serova and Rabal to put together a research proposal for the Science Council and Picard will give his full recommendation. Data complies and Rabal thanks Picard for the opportunity but Serova is not interested and refuses to have anything to do the proposal as delays will still be caused.

Some time later, La Forge returns to the bridge, reporting that the warp drive is now on-line and that the other systems are ready. Picard orders a course to rendezvous with the Fleming, but as the order is given, Worf reports that the Hekaran vessel is moving away and that Serova is on board. When a channel is opened to the ship, Rabal asks Serova what she is doing and she grimly replies that she is giving them the proof that they wanted. Data informs Picard that she is overloading her warp engines, inevitably leading to a warp core breach. Soon, Serova's ship explodes with a shock wave coming from the epicenter of the breach. The Enterprise shakes as it is hit by the shock wave and Riker orders a full reverse. Data reports when the Enterprise clears the rift and adds that tetryon emissions in the area are increasing rapidly. The Enterprise is dwarfed by a massive purple phenomenon that has appeared in front of it.

Act Four

A subspace rift has formed

Data analyzes the phenomenon and finds that it is one-tenth of a light year in diameter and that high levels of tetyron radiation are emanating from it. He concludes that it is the subspace rift that Serova and Rabal had theorized and the bridge crew look at the viewscreen in shock and awe. The Fleming is found to be near its previous co-ordinates before the rift formed but it is now within the rift, and when Picard asks Rabal, who is still in shock from his sister's suicide, if a ship can survive within a rift, he is not certain. Suddenly, the Enterprise shakes violently from a high-energy distortion wave coming from the rift. As long as the Enterprise maintains is current position, its shields will protect the ship from the waves, but because the waves are much more intense inside the rift, the Fleming's shields will fail within twelve hours. Riker asks whether the Enterprise can go inside the rift to recover the Fleming. La Forge says that it is possible but only at impulse, for the rift is in a state of accelerating instability; warp fields could expand the rift even further. Yet traveling below warp speed would take weeks to reach the Fleming – time they do not have. Picard wants better options and orders Data, La Forge and Rabal to analyze the rift and work on a way to recover the Fleming.

"Second officer's log, stardate 47312.1. Our new sensor readings have greatly improved our understanding of the rift. However, we have been unable to find any way to counteract it."

Data, La Forge and Rabal have been working in the science lab for quite some time and they find that the rift fully supports the theories that Serova and Rabal made and that there is no way to close or reduce the size of the rift. Data suggests finding a stable region within the rift where the Enterprise can use its warp engines but there is nowhere inside the rift stable enough to travel at warp speed. As they all look at the monitor, La Forge notices something unusual and looks closer at it with the computer. Rabal makes out that it is a subspace instability outside of the rift – something that should be impossible. Rabal says that he'll study the second instability in detail while La Forge prepares to break the bad news the Captain Picard that they cannot think of a practical way to get to the Fleming in time but Data is not so sure that that is true.

In the ready room with Commander Riker, Data suggests to Captain Picard that the Enterprise "coast" into the rift by initiating a brief but intense warp pulse from their current position where they'd be able to reach a high enough velocity to enter the rift, beam the crew of the Fleming on to the Enterprise and leave the rift without using the warp engines inside of it. However the Enterprise would only be able to stay at warp speed for two minutes before coming out of warp, giving them very little time to transport the crew of the Fleming aboard. Data's plan is far from without risk but with little alternative, Picard goes ahead with it and Data leaves to make his calculations. In main engineering, La Forge and Data make their calculations and find that saturating the warp nacelles with a warp field at 18% will give them just over two minutes of warp speed – as good as they could get. As La Forge turns saturating the warp nacelles over to the computer, he questions how he and Data could have missed the connection between warp drive and the formation of the rift, especially as he and Data have logged thousands of hours on the warp engines of the Enterprise. He feels that they were wrong this time about warp field theory but Data points out that, technically speaking, they were not wrong as Serova's theories were not based on empirical evidence but rather on assumptions that, until now, could not be proven. La Forge feels somewhat guilty about so readily dismissing Serova but Data tries consoling him by saying that perhaps her aggressive nature made the situation adversarial but La Forge realizes that he was taking everything personally – La Forge looks at the warp core as being something beautiful and never considered it to be so destructive as well. The nacelles will take a further thirty minutes to saturate and La Forge leaves engineering, asking Data to call him when the saturation is complete.

La Forge enters Ten Forward and joins Rabal, staring at the rift. La Forge feels responsible both for Serova's death and the formation of the rift but Rabal says that La Forge was not at fault – he felt that it was down to time. He was confident that further research would have proved the theories but Serova was unwilling to wait. The two then consider where they'll go from this point onwards and La Forge has doubts about the Federation abandoning the use of warp drive as they are so dependent on it.

A little while later, all of the officers are manning their stations and Data reports that the warp pulse calculations are complete and that the warp drive will be engaged for just 6.3 seconds before disengaging. Damage control teams are put on standby and a course is plotted to intercept the Fleming and La Forge initiates the warp pulse. The Enterprise jumps to warp and six seconds later, the warp drive is disengaged and immediately as the ship enters the rift, it shakes. The ship is a little over eighty seconds from reaching the Fleming and transporters are on standby but Worf reports that power emissions from the medical ship are rising – it may be attempting to engage its warp engines. The crew realize the danger of a ship engaging its warp engines within the rift but the Enterprise is now just under a minute from reaching the Fleming (well outside of transporter range) and communications cannot be established between the two ships as the subspace interference is too great. The Fleming engages its warp engines and as it does, the Enterprise is shaken violently, taking damage to decks six and fourteen but the flagship's structural integrity field is holding. The Fleming, however, is much worse off, having sustained very heavy damage and life support systems on the ship are now failing. Unfortunately there is now a more serious consequence to the Fleming having engaged its warp engines – the rift has increased in size by 2.3% and the Enterprise no longer has sufficient momentum to escape the rift and the flagship is violently shaken again by a much more intense distortion wave.

Act Five

Data reports that the intensity of the energy distortion waves has increased by a factor of ten, occurring now every fifty-nine seconds. The Enterprise is now within transporter range of the Fleming and begins evacuation procedures. Because the distortion waves are both more intense and frequent, the hull stress is reaching maximum tolerance. Riker asks Data if forcing an EPS discharge through the impulse reactor would be enough for the Enterprise to escape the rift but Data does not believe so and that even if it did work, the resulting explosion would almost certainly destroy most of the saucer section in the process.

The Enterprise "surfs" a distortion wave

La Forge then cuts in suggesting that the Enterprise could clear the rift without using the warp engines by "surfing" the distortion waves – by phase-matching the deflector shields with the EM variance of the distortion wave they would be pulled along in the wave. As soon as the crew of the Fleming has been beamed over, La Forge phase matches the deflector shield and the distortion wave hits the ship fourteen seconds later but it doesn't work as the Enterprise was unable to maintain contact with the wave. La Forge then realizes that the speed differential between the Enterprise and the distortion wave was too great so the ship was thrown off of the wave. Riker points out that the hull stress is already critical and that the ship cannot take much more punishment from the waves. Data suggests engaging the impulse engines at full power to lessen the shock of the wave hitting the ship and Picard agrees. Another distortion wave hits the Enterprise but this wave pulls it along. Hull stresses are exceeding their maximum tolerance and the structural integrity fields on decks ten through sixteen are failing although backups are put in place. The Enterprise begins to break away from the distortion wave but La Forge attempts to compensate and hull stresses are at 120% of their maximum tolerance and the destruction of the ship is imminent. As the Enterprise approaches its demise, the ship breaks from the distortion wave and is thrown clear from the subspace rift and all of the ship's systems return to normal as do the hull stresses.

"Captain's Log, Stardate 47314.5. We have been continuing our research, while the Federation Council studies our reports on the subspace rift. It now appears certain that what we've seen here will have repercussions for many years to come."

Rabal delivers a grim report

All of the senior staff are present in the observation lounge in a somber mood where La Forge and Rabal are standing by the main monitor giving their report. La Forge shows that the scans of the sector have shown several more subspace instabilities and that if they are exposed to warp field energy, they too may create other subspace rifts. Rabal activates the monitor and displays the probable locations where subspace rifts will form over the next forty years based on warp drive patterns – subspace rifts will occupy a significant region of the sector. Picard thanks the two and they take their seats while he reads out new directives from the Federation Council on a PADD.

"Until we can find a way to counteract the warp field effect, the Council feels our best course is to slow the damage as much as possible. Therefore, areas of space found susceptible to warp fields will be restricted to essential travel only, and effective immediately, all Federation vessels will be limited to a speed of – Warp 5? – except in cases of extreme emergency."

Worf reports that the Klingons will observe the restrictions but the Romulans will not, and Troi wonders if the Ferengi or the Cardassians will be willing to observe them, but the Federation will inform all warp-capable species regardless and hopes that they realize that it is in their best interests to take similar action. Crusher knows that the warp speed limitations will prevent further rifts from forming but asks what will be done with the one that has formed. Unfortunately there is nothing that can be done at the moment and although Hekaras II is not in immediate danger, gravitational shifts caused by the rift have already affected the planet, changing its climate. Picard informs Rabal that Starfleet will be setting up a weather modification network for Hekaras II that will suffice for now although it will only work on a short-term basis. As the seriousness of the problem sinks in, Picard dismisses the staff while La Forge remains in the observation lounge. The chief engineer tells his captain that the thermal stabilizers will be ready for the Hekarans in a day's time. Picard acknowledges La Forge but he can't help but feel that through his forty-three years as a Starfleet officer he was helping to destroy the one thing that he held dear. La Forge confidently replies that it won't end that way and that there's time to repair the damage that they had done.

Memorable Quotes

"How about a phaser? A low stun setting at just the right moment might do the trick..."
"Geordi, I cannot stun my cat."

- La Forge and Data, on training Spot

"Hey, hey, don't you spit at me!"

- Geordi La Forge, to Spot

"What did she train her cat to do?"
"She had that cat jumping into her arm on command."
"Interesting...Perhaps I could modify your sister's techniques to keep Spot from jumping on the console. Do you know how she was able to train her cat?"
"Well, as I recall, she walked around for two months with a piece of tuna in her blouse."
(Impressed) "Mph!"

- La Forge and Data, on training cats

"This is down. Down is good. This is up. Up is no."

- Data, attempting to train Spot

"Too bad, Mister Kaplan."

- La Forge, after getting a higher power conversion rate than Commander Kaplan

Jeri Taylor recalled, "This was a troubled episode from the first...We had tried it in many guises and it never worked. At the beginning of the seventh year, I sent Naren and Brannon to a big breakfast meeting of an environmental watchdog group that we have here in Hollywood and they came back inspired. Naren was so galvanized. He said, 'I want to take a crack at "Limits." I want to do this. This is important.' I agreed. It was a story I really wanted to do and I think it does make an important statement, but dramatizing a huge issue like that is always the trouble. We started down many roads. At first, we had Geordi's sister come on board to help him adjust to the death of his mother, but that seemed to muddle everything completely. We then started the whole little thread of Geordi in competition with the engineer from another ship so we could show Geordi's deeply felt belief in technology and the benefits of technology, so that he would be at war with himself when realizing that it was contributing to something disastrous.

"When the script was written, it turned out to be very, very short and so we then started adding scenes about Data's cat. By luck, or by bad luck, all of those scenes turned out to be at the beginning of the show, so you had an episode that started very fitfully and seemed to be about Data's cat and then it took a turn and seemed to be about Geordi and his rivalry with this other guy. Then it went back to the cat and then, finally, in about the third act, the real story began and, by that point, I think people were hopelessly lost. It sort of never got back on track, but it's still an important idea and our intentions were good." (Captains' Logs: The Unauthorized Complete Trek Voyages)

The vortex scene was filmed in the special and visual effects unit at Image G on 10 June1993. ("Departmental Briefing Year Five" ("Shooting Elements"), TNG Season 5 DVD special feature)

First UK airdate: 6 March 1996

Continuity

This was the first Star Trek episode where the maximum warp speed limitation was imposed by the Federation on all Starfleet vessels. Further references were made to the speed limit in "The Pegasus" and "Eye of the Beholder" later in the season. According to the unpublished VOY Season 1 edition of the Star Trek: Voyager Technical Guide, by Rick Sternbach and Michael Okuda, it was suggested that because of the variable geometry pylons, warp fields may no longer have a negative impact on habitable worlds as established in this episode.

This was the first episode in which Data's cat, Spot, was referred to as "she" rather than "he". Though unexplained, the cat's change in gender would go on to play a significant role in TNG: "Genesis", in which she has kittens.

Taylor commented, "I've been on enough series and tried to do environmental issues to realize that they are so hard to dramatize, because you're talking about the ozone hole, and...it's so, so hard to make it emotional and personal and give impact on that kind of level." She praised Shankar's attempts to deal with the "doomed premise." (Star Trek: The Next Generation Companion)

Shankar regretted that the emotional arc of Geordi's sister coming aboard was dropped rather than reworked. He admitted that the finished episode was "not one of my finer moments." (Star Trek: The Next Generation Companion)

Braga observed, "There were preposterous moments in that show. On the other hand, we knew the risks, but we felt it was real important to at least try to do an environmental show. We struggled with making it a personal story and in the end it just didn't work as well as we wanted it to. We couldn't find a personal angle. When you limit warp drive, the rug is being pulled out from under Star Trek. I wish more time had been spent with that, and less time with Spot and cat." (Captains' Logs: The Unauthorized Complete Trek Voyages)

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